package dao;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;


public class UpXml extends HttpServlet {

 /**
	 * 
	 */
private static final long serialVersionUID = 1L;

public UpXml() {
  super();
 }

 public void destroy() {
  super.destroy(); // Just puts "destroy" string in log
  // Put your code here
 }

 public void doGet(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  doPost(request, response);
 }

 @SuppressWarnings({ "deprecation", "rawtypes", "unused", "static-access" })
public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
	 
	 PrintWriter out = response.getWriter();
	  // 设置字符编码为UTF-8, 这样支持汉字显示
	  response.setContentType("text/html;charset=UTF-8");
	    out.println("<!doctype html>");
	    out.println("<html lang='en'>");
	    out.println("<head>");
	    out.println("<meta charset='UTF-8'>");

	    out.println("<title>Document</title>");
	    out.println("<script>"
	    		+ "window.onload=function()"
	    		+ "{"
	    		+ "var flag=parseInt(document.getElementById(\"wc\").innerHTML);if(flag==4)"
	    		+ "{window.opener.document.getElementById(\""
	    		+request.getParameter("Ids")
	    		+"\").value=document.getElementById(\"url\").innerHTML;"
	    		+ "}"
	    		+ ""
	    		+ "}"
	    		+ "</script>");
	    out.println("</head>");
	    out.println("<body>");
	    out.println(request.getParameter("Ids"));
	 
	 HttpSession session=request.getSession(true);
	  
	 String student=(String)session.getAttribute("nowusername");
	 String student2=(String)session.getAttribute("student_number");
	 String flag=(String)session.getAttribute("access");//判断用户类型  学生 or 上级

	 
  response.setContentType("text/html");
  // 设置字符编码为UTF-8, 这样支持汉字显示
  response.setCharacterEncoding("UTF-8");  
  
  final long MAX_SIZE = 3 * 1024 * 1024;// 设置上传文件最大为 3M
  // 允许上传的文件格式的列表
  final String[] allowedExt = new String[] {"xml"};

  // 实例化一个硬盘文件工厂,用来配置上传组件ServletFileUpload
  DiskFileItemFactory dfif = new DiskFileItemFactory();
  dfif.setSizeThreshold(4096);// 设置上传文件时用于临时存放文件的内存大小,这里是4K.多于的部分将临时存在硬盘
  dfif.setRepository(new File(request.getSession().getServletContext().getRealPath("/")+"ImagesUploadTemp"));// 设置存放临时文件的目录,web根目录下的ImagesUploadTemp目录
  


  // 用以上工厂实例化上传组件
  ServletFileUpload sfu = new ServletFileUpload(dfif);
  // 设置最大上传尺寸
  sfu.setSizeMax(MAX_SIZE);

  
  // 从request得到 所有 上传域的列表
  
  List fileList = null;
  try 
  {
   fileList = sfu.parseRequest(request);//
  } 
  catch (FileUploadException e) 
  {// 处理文件尺寸过大异常
	  if (e instanceof SizeLimitExceededException) 
	  {
		out.println("<div><p>文件超过指定大小" + MAX_SIZE + "字节<p/></div>");
	    out.println("<div id='wc'>"+1+"</div>");	   
	    out.println("</body>");
	    out.println("</html>");
	  
	    return;
   }
   e.printStackTrace();
  }
  // 没有文件上传
  if (fileList == null || fileList.size() == 0) 
  {
	  out.println("<div><p>请选择上传文件<p/></div>");
	  out.println("<div id='wc'>"+5+"</div>");	   
	  out.println("</body>");
	  out.println("</html>");
	  
	  return;
  }
  // 得到所有上传的文件
  Iterator fileItr = fileList.iterator();
  // 循环处理所有文件

  boolean xc=fileItr.hasNext();

  while (xc) 
  {
   FileItem fileItem = null;
   String path = null;
   long size = 0;
   // 得到当前文件
   fileItem = (FileItem) fileItr.next();
   // 忽略简单form字段而不是上传域的文件域(<input type="text" />等)
   if (fileItem == null || fileItem.isFormField()) 
   {
    continue;
   }
   // 得到文件的完整路径
   path = fileItem.getName();
   // 得到文件的大小
   size = fileItem.getSize();
   if ("".equals(path) || size == 0) 
   {
		  out.println("<div><p>请选择上传文件<p/></div>");
		  out.println("<div id='wc'>"+5+"</div>");	   
		  out.println("</body>");
		  out.println("</html>");
    
	   return;
   }

   // 得到去除路径的文件名
   String t_name = path.substring(path.lastIndexOf("\\") + 1);
   // 得到文件的扩展名(无扩展名时将得到全名)
   String t_ext = t_name.substring(t_name.lastIndexOf(".") + 1);
   // 拒绝接受规定文件格式之外的文件类型
   int allowFlag = 0;
   int allowedExtCount = allowedExt.length;
   for (; allowFlag < allowedExtCount; allowFlag++) 
   {
	    if (allowedExt[allowFlag].equals(t_ext))
	    	break;
   }
   if (allowFlag == allowedExtCount) 
   {
		  out.println("<div><p>请选择以下文件上传：<p/></div>");
	   for (allowFlag = 0; allowFlag < allowedExtCount; allowFlag++)
		   out.println("*." + allowedExt[allowFlag]+ "&nbsp;&nbsp;&nbsp;");
    
    	out.println("<p /><a href=\"\\manager_web\\excelToSql.jsp\" target=\"_top\">返回</a>");
    return;
   }

   long now = System.currentTimeMillis();
   String prefix =String.valueOf(now);
   // 根据系统时间生成上传后保存的文件名

 
   
   // 保存的最终文件完整路径,保存在web根目录下的ImagesUploaded目录下
   
   String QS=request.getSession().getServletContext().getRealPath("/");
   String u_name = QS+"/WEB-INF/Xml/"+student+prefix + "." + t_ext;
   
	   try 
	   {
	    // 保存文件
		CreateFileUtil factorFile=new CreateFileUtil();
		factorFile.CreateFile(u_name);
	    fileItem.write(new File(u_name));
	    out.println(u_name);
	    out.println("文件上传成功，已保存为: " + prefix + "." + t_ext+ " &nbsp;&nbsp;文件大小: " + size + "字节<p />");
	    
	    out.println("<div id='wc'>"+4+"</div>");
	    out.println(""
	    		+ "<div id='url'>"+u_name+"</div>");
	    out.println("</body>");
	    out.println("</html>");

	   } catch (Exception e) 
	   {
	    e.printStackTrace();
	   }
	   
	   return ;

  }
  
  out.println("<div id='wc'>"+5+"</div>");	
  out.println("</body>");
  out.println("</html>");

 return;

 }

 public void init() throws ServletException {
  // Put your code here
 }

}